Catalytic ozonation of phenolic compounds - The case of gallic acid

被引:52
作者
Carbajo, M.
Beltran, F. J.
Medina, F.
Gimeno, O.
Rivas, F. J.
机构
[1] Univ Extremadura, Dept Ingn Quim & Energet, E-06071 Badajoz, Spain
[2] Univ Rovira & Virgili, Escola Tecn Super Engn Quim, Tarragona 43007, Spain
关键词
perovskite; ozone; gallic acid; heterogeneous catalysis; kinetics;
D O I
10.1016/j.apcatb.2006.04.019
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The catalytic ozonation of gallic acid has been carried out in the presence of a perovskite type material (LaTi0.15Cu0.85O3). Some of the main operating parameters like temperature, catalyst and ozone doses exerted a positive influence in the ozonation rate. Contrarily, initial gallic acid concentration showed a negative effect in terms of conversion while the optimum working pH was found to be around 2 (3.5 if deactivation is avoided). Addition of tert-butyl alcohol (free radical scavenger) had no effect on the catalytic removal of gallic acid, although its presence decreased the mineralization degree achieved. The catalyst demonstrated a high stability in terms of the acid removal, however, a partial deactivation was experienced in terms of organic carbon elimination if compared the first and second reuses. The catalyst kept its activity after further reutilisations. Due to the moderate regime developed in the homogeneous phase, the process was better simulated by an empirical expression rather than using a detailed model. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:177 / 186
页数:10
相关论文
共 14 条
  • [1] DETERMINATION OF OZONE IN WATER BY THE INDIGO METHOD
    BADER, H
    HOIGNE, J
    [J]. WATER RESEARCH, 1981, 15 (04) : 449 - 456
  • [2] Beltran F., 2004, OZONE REACTION KINET
  • [3] OXIDATION BY OZONE AND CHLORINE DIOXIDE OF 2 DISTILLERY WASTE-WATER CONTAMINANTS - GALLIC ACID AND EPICATECHIN
    BELTRAN, FJ
    ENCINAR, JM
    GARCIAARAYA, JF
    [J]. WATER RESEARCH, 1993, 27 (06) : 1023 - 1032
  • [4] Kinetics of competitive ozonation of some phenolic compounds present in wastewater from food processing industries
    Beltrán, FJ
    García-Araya, JF
    Rivas, FJ
    Alvarez, P
    Rodríguez, E
    [J]. OZONE-SCIENCE & ENGINEERING, 2000, 22 (02) : 167 - 183
  • [5] BELTRAN FJ, 1992, TRANSICHEME, V71, P57
  • [6] Mineralisation of coloured aqueous solutions by ozonation in the presence of activated carbon
    Faria, PCC
    Orfao, JJM
    Pereira, MFR
    [J]. WATER RESEARCH, 2005, 39 (08) : 1461 - 1470
  • [7] GUROL MD, 1985, J WATER POLLUT CON F, V57, P235
  • [8] A nanometer-ZnO catalyst to enhance the ozonation of 2,4,6-trichlorophenol in water
    Huang, WJ
    Fang, GC
    Wang, CC
    [J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2005, 260 (1-3) : 45 - 51
  • [9] Catalytic ozonation: a promising advanced oxidation technology for water treatment
    Legube, B
    Leitner, NKV
    [J]. CATALYSIS TODAY, 1999, 53 (01) : 61 - 72
  • [10] pH effects on catalytic ozonation of carboxylic acids with metal on metal oxides catalysts
    Leitner, NKV
    Fu, HX
    [J]. TOPICS IN CATALYSIS, 2005, 33 (1-4) : 249 - 256